What is Voice Activity Detection? (VAD)
2 min read · Bolcho
The signal-processing step that tells whether a chunk of audio contains human speech or just silence and noise.
Voice Activity Detection explained
VAD is the gatekeeper for both barge-in and endpointing: it decides when the caller is actually speaking. On noisy Indian phone lines — traffic, TV, crosstalk — robust VAD is what prevents false interruptions.
Why it matters for voice AI in India
Understanding voice activity detection helps you build voice agents that actually work for Indian callers, genuine languages, low latency, and near-cost pricing. Bolcho is built around exactly these fundamentals.
See it in a real agent
Bolcho handles this for you end-to-end. Start a voice or chat agent free.
Frequently asked questions
What does Voice Activity Detection mean?
The signal-processing step that tells whether a chunk of audio contains human speech or just silence and noise.
Why does voice activity detection matter in voice AI?
VAD is the gatekeeper for both barge-in and endpointing: it decides when the caller is actually speaking. On noisy Indian phone lines — traffic, TV, crosstalk — robust VAD is what prevents false interruptions.